CN109540361B - Detection device for pulser control valve - Google Patents
Detection device for pulser control valve Download PDFInfo
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- CN109540361B CN109540361B CN201710858410.3A CN201710858410A CN109540361B CN 109540361 B CN109540361 B CN 109540361B CN 201710858410 A CN201710858410 A CN 201710858410A CN 109540361 B CN109540361 B CN 109540361B
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- control valve
- pulser
- pulser control
- detection device
- elastic force
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- 238000001514 detection method Methods 0.000 title claims abstract description 111
- 230000001681 protective effect Effects 0.000 claims description 16
- 230000004308 accommodation Effects 0.000 description 11
- 230000008859 change Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 210000000078 claw Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0038—Force sensors associated with force applying means applying a pushing force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention provides a detection device for a pulser control valve, which comprises: a base having an accommodating portion; the elastic force application part is arranged in the accommodating part and is used for applying preset pressure to the pulser control valve; a position detection part arranged between the elastic force application part and the pulser control valve, and used for detecting the position of the pulser control valve; and the pressure detection part is connected with the position detection part, is arranged between the elastic force application part and the pulser control valve and is used for detecting the thrust of the pulser control valve. By applying the technical scheme of the invention, the problem that whether the control valve of the pulser can work normally cannot be judged quickly and simply by the detection device in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of pulsators, in particular to a detection device for a control valve of a pulsator.
Background
In the system of the wireless measurement while drilling technology, the pulser takes the task of signal transmission for logging while drilling. The ejection force and the ejection stroke length of the sharp head of the pulser determine whether the ground can acquire effective high-strength and high-resolution pulses. Based on this, it is necessary to detect each parameter of the pulser.
The main structure of the detection device for the pulser control valve commonly used at present is a heavy base on which a dynamometer is arranged to measure the force of the pulser control valve, but the stroke of the pulser control valve cannot be measured. Meanwhile, the existing detection device cannot quickly and simply judge whether the pulser control valve can normally work, so that the working efficiency is greatly reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a detection device for a pulser control valve, and can solve the problem that the detection device in the prior art cannot quickly and simply judge whether the pulser control valve can normally work.
The technical solution of the invention is as follows:
the invention provides a detection device for a pulser control valve, which comprises: a base having an accommodating portion; the elastic force application part is arranged in the accommodating part and is used for applying preset pressure to the pulser control valve; a position detection part arranged between the elastic force application part and the pulser control valve, and used for detecting the position of the pulser control valve; and the pressure detection part is connected with the position detection part, is arranged between the elastic force application part and the pulser control valve and is used for detecting the thrust of the pulser control valve.
Further, the base includes: a cylinder; the guide piece is connected with the cylinder, an accommodating part is formed between the cylinder and the guide piece, and the elastic force application part is sleeved on the guide piece.
Further, the detection device further comprises: the sliding part is sleeved on the guide part, one end of the sliding part is abutted to the elastic force application part, the other end of the sliding part is connected with the position detection part, and the sliding part, the position detection part and the pressure detection part can move along the guide part.
Further, the position detection portion includes an indication sheet connected to the pressure detection portion.
Furthermore, the accommodating part comprises a first accommodating hole and a second accommodating hole, the first accommodating hole and the second accommodating hole are arranged at an included angle, the elastic force application part is arranged in the first accommodating hole, and the indicating sheet is movably arranged in the first accommodating hole and the second accommodating hole.
Further, the detection device further includes an indication line provided at a position of the base near the second accommodation hole, the indication line corresponding to a movement position of the indication piece.
Further, the pressure detecting portion includes a force measuring rod disposed between the position detecting portion and the pulser control valve.
Further, the detection device comprises a fixing portion, the fixing portion is connected with the base, and the fixing portion is used for fixing the pulser control valve.
Further, the securing portion includes at least one screw that passes through the base to secure the pulser control valve.
Further, the detection device further comprises a protective sleeve, the protective sleeve is connected with the base, and the pressure detection portion is located in the protective sleeve.
By applying the technical scheme of the invention, the position detection part and the pressure detection part are arranged in the detection device, so that the position of the pulser control valve can be detected by the position detection part, and the thrust of the pulser control valve is detected by the pressure detection part, so that the thrust and the stroke of the pulser control valve can be detected. Moreover, the elastic force application part is arranged in the detection device to apply the preset pressure to the pulser control valve, so that whether the pulser control valve can normally work under the given load can be quickly, simply and conveniently measured, and whether the pulser control valve is qualified or not can be judged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a detection device for a pulser control valve according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a base; 11. a cylinder; 12. a guide member; 10a, an accommodating part; 101a, a first accommodation hole; 102a, a second accommodation hole; 20. an elastic force application part; 30. a position detection unit; 40. a pressure detection unit; 50. a slider; 60. a fixed part; 61. a screw; 70. a protective sleeve; 100. the pulser controls the valve.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the device structures and/or processing steps that are closely related to the scheme according to the present invention are shown in the drawings, and other details that are not so relevant to the present invention are omitted.
As shown in fig. 1, a detection device for a pulser control valve according to an embodiment of the present invention includes a base 10, an elastic biasing portion 20, a position detection portion 30, and a pressure detection portion 40, wherein the base 10 has a receiving portion 10a, the elastic biasing portion 20 is disposed in the receiving portion 10a, the elastic biasing portion 20 is configured to apply a preset pressure to the pulser control valve 100, the position detection portion 30 is disposed between the elastic biasing portion 20 and the pulser control valve 100, the position detection portion 30 is configured to detect a position of the pulser control valve 100, the pressure detection portion 40 is disposed between the elastic biasing portion 20 and the pulser control valve 100 and is connected to the position detection portion 30, and the pressure detection portion 40 is configured to detect a thrust of the pulser control valve 100.
With this arrangement, the position detection unit and the pressure detection unit are provided in the detection device, so that the position of the pulser control valve can be detected by the position detection unit, and the thrust force of the pulser control valve can be detected by the pressure detection unit, thereby detecting the thrust force and the stroke of the pulser control valve. Moreover, the elastic force application part is arranged in the detection device to apply the preset pressure to the pulser control valve, so that whether the pulser control valve can normally work under the given load can be quickly, simply and conveniently measured, and whether the pulser control valve is qualified or not can be judged.
Further, in the present invention, in order to guide the biasing direction of the elastic biasing portion, the base 10 may be configured to include a cylinder 11 and a guide 12, wherein the guide 12 is connected to the cylinder 11, an accommodating portion 10a is formed between the cylinder 11 and the guide 12, and the elastic biasing portion 20 is fitted over the guide 12.
With this arrangement, when it is required to apply the detection device of the present invention to detect that the pulser control valve can normally operate under a given load, a certain load is applied to the pulser control valve by the action of the elastic force application portion 20, the thrust force of the pulser control valve is detected by the pressure detection portion, and the position of the pulser control valve is detected by the position detection portion, the moving range of the pulser control valve can be intuitively obtained, and when the moving range of the pulser control valve is within the set range, it is considered that the pulser control valve can normally operate.
Specifically, as an embodiment of the present invention, in consideration of cost and ease of purchasing parts, a compression spring may be used as the elastic force applying portion 10, and a locking screw may be used as the guide 12, the locking screw including a screw head and a screw rod, the screw head being fixedly connected to the cylinder inner cavity of the cylinder 11 by a screw thread, and the compression spring being sleeved on the screw. Wherein, a proper pressure spring is selected, and an approximately constant force is applied to the pressure detection part 40 through the pressure spring, and the magnitude range of the force is 26N to 31N, and the force is used for simulating the force of the external load. At this time, the pulser control valve 100 has internal components that are controlled by an electric signal to change their positions in the forward and backward directions. The position detection part 30 is arranged between the elastic force application part 20 and the pulser control valve 100, the movement of the pulser control valve 100 can drive the movement of the position detection part 30, the position detection part 30 detects the position of the pulser control valve 100, and when the position detection part 30 detects that the movement distance of the pulser control valve 100 is about 4mm, the pulser control valve 100 can normally work.
In the present invention, in order to improve the operation comfort of the detection device, the detection device may be configured to further include a slider 50, the slider 50 is fitted over the guide 12, one end of the slider 50 abuts against the elastic biasing portion 20, the other end of the slider 50 is connected to the position detection portion 30, and the slider 50, the position detection portion 30, and the pressure detection portion 40 are movable along the guide 12.
By applying the configuration, the sliding member 50 is arranged, and the sliding member 50 is sleeved on the guide 12, so that in the process of detecting the working state of the pulser control valve by the detection device, the elastic force application part 20 is in a pre-compression stress state, the elastic force application part 20 drives the position detection part 30 and the pressure detection part 40 to simultaneously move towards the pulser control valve 100 along the guide 12 through the sliding member 50, thereby ensuring that the elastic force application part 20 provides an approximately constant force to the pulser control valve 100 along the preset direction, and the magnitude range of the force can be controlled within 26N to 31N, so as to simulate the force of an external load. At this time, the pulser control valve 100 has internal components that are controlled by an electric signal to change their positions in the forward and backward directions. The position detecting part 30 and the pressure detecting part 40 are both disposed between the elastic force applying part 20 and the pulser control valve 100, and the movement of the pulser control valve 100 can drive the position detecting part 30, the pressure detecting part 40 and the slider 50 to move simultaneously in the opposite direction along the guide 12. In this process, the position detector 30 detects the position of the pulser control valve 100, and when the position detector 30 detects that the moving distance of the pulser control valve 100 is about 4mm, it is considered that the pulser control valve 100 can normally operate.
Further, in the present invention, in order to simplify the structural complexity of the detection device, the position detection portion 30 may be configured to include an indication sheet connected to the pressure detection portion 40.
With this arrangement, the position detection unit 30 is configured to include the indicator piece, and the indicator piece moves along the guide 12 together with the pressure detection unit 40 during the detection of the operating state of the pulser control valve by the detection means, so that the moving distance of the pulser control valve under a predetermined load can be visually observed by the movement of the indicator piece, which is simple and efficient.
In the present invention, in order to realize the movement of the indicator piece along the guide 12, the receiving portion 10a may be configured to include a first receiving hole 101a and a second receiving hole 102a, the first receiving hole 101a and the second receiving hole 102a are disposed at an included angle, the elastic biasing portion 20 is disposed in the first receiving hole 101a, and the indicator piece is movably disposed in the first receiving hole 101a and the second receiving hole 102 a.
Specifically, as one embodiment of the present invention, as shown in fig. 1, the first accommodation hole 101a is provided along the axial direction of the cylinder 11, the second accommodation hole 102a is provided along the radial direction of the cylinder 11, and the second accommodation hole 102a is provided at a middle position of the cylinder 11, where the middle position refers to all positions except for both end portions. In the process of detecting the working state of the pulser control valve by using the detecting device, the elastic force application portion 20 can drive the indicating piece and the pressure detecting portion 40 to move along the guide 12 simultaneously through the sliding member 50, so as to ensure that the elastic force application portion 20 applies an approximately constant force to the pulser control valve 100 in the predetermined direction. The indication sheet can move in the first accommodation hole 101a and the second accommodation hole 102a simultaneously.
Further, in order to clearly and intuitively represent the moving position of the pulser-controlled valve, the detection means may be configured to further include an indication line provided at a position of the base 10 near the second accommodation hole 102a, the indication line corresponding to the moving position of the indication piece.
With this configuration, during the operation of the pulser control valve detected by the detection device, the elastic force application portion 20 can drive the indication plate and the pressure detection portion 40 to move along the guide 12 simultaneously through the sliding member 50, so as to ensure that the elastic force application portion 20 applies an approximately constant force to the pulser control valve 100 along the predetermined direction. The indication sheet can move in the first accommodation hole 101a and the second accommodation hole 102a simultaneously. Since the indicating line is provided at a position of the base 10 near the second receiving hole 102a and corresponds to the moving position of the indicating piece, the moving position of the pulser control valve can be obtained by observing the indicating line corresponding to the position of the indicating piece.
In the present invention, in order to simplify the apparatus structure and reduce the cost, the pressure detecting portion 40 may be configured to include a force measuring rod disposed between the position detecting portion 30 and the pulser control valve 100. With this arrangement, by providing the force measuring rod between the position detecting section 30 and the pulser control valve 100, the force applied to the pulser control valve can be detected in real time by the force measuring rod.
Specifically, as shown in fig. 1, the indicating sheet and the sliding member 50 are fixedly connected together by screws, a mounting hole is provided on the indicating sheet, one end of the force measuring rod is installed in the mounting hole in an interference fit manner to realize the fixed connection of the force measuring rod and the indicating sheet, and the other end of the force measuring rod abuts against a tip of the pulser control valve. And selecting a proper compression spring, and applying an approximately constant force to the force measuring rod through the compression spring, wherein the force is in the range of 26N to 31N and is used for simulating the force of an external load. At this time, the internal components of the pulser-controlled valve 100 are controlled by the electric signal, so that the tip of the pulser-controlled valve generates a position change moving back and forth. The indicating sheet is arranged between the elastic force application part 20 and the pulser control valve 100, the indicating sheet detects the position of the pulser control valve, and the detecting device can lead the position change of the sharp head of the pulser control valve to the indicating sheet through the force measuring rod. When the indicating sheet detects that the moving distance of the pulser control valve is about 4mm, the pulser control valve can work normally.
Further, in the present invention, the detection apparatus may be configured to further include a fixing portion 60, the fixing portion 60 being connected to the base 10, the fixing portion 60 being used to fix the pulser control valve 100. With this arrangement, the pulser control valve 100 is fixed by the fixing portion 60 during the detection of the pulser control valve, so that the usability and the detection accuracy of the device can be improved.
In addition, in order to simplify the structure of the apparatus and reduce the cost, the fixing part 60 may be configured to include at least one screw 61, and the at least one screw 61 passes through the base 10 to fix the pulser control valve 100. As an embodiment of the present invention, a claw screw may be used as the fixing portion 60.
In order to further improve the fixing firmness of the detection device on the pulser control valve, the fixing portion 60 may be configured to include a plurality of screws 61, and the plurality of screws 61 are spaced apart from each other on the base 10.
In the present invention, in order to protect the pressure detection part of the detection device, the detection device may be configured to further include a protective cover 70, the protective cover 70 being connected to the base 10, the pressure detection part 40 being located inside the protective cover 70. With this arrangement, by disposing the pressure detection portion 40 in the protective cover 70, it is possible to avoid the pressure detection portion 40 from being damaged by collision with other parts during transportation of the apparatus.
For further understanding of the present invention, the following description will be made in detail with reference to fig. 1 for the detection of the pulser control valve by the detection device of the present invention.
As shown in fig. 1, the detecting device of the present invention includes a cylinder 11, a guide 12, a slider 50, an indicating sheet, a force measuring bar, a protective cover 70, a claw screw, and a pressure spring. The guide 12 is in threaded connection with one end of the cylinder 11, the protective sleeve 70 is in threaded connection with the other end of the cylinder 11, and the cylinder 11, the guide 12 and the protective sleeve 70 jointly form a main structure of the detection device. A pressure spring and a sliding part 50 are sleeved on the guide part 12, one end of the pressure spring is abutted with the end cap of the guide part 12, and the other end of the pressure spring is abutted with the sliding part 50. The sliding part 50 is fixedly connected with one side of the indicating sheet through a plurality of screws, one end of the force measuring rod is fixedly connected with the other side of the indicating sheet, and the other end of the force measuring rod is abutted with the tip of the pulse controller control valve. The slider 50 is slidable within the body structure. The avoidance hole is formed in the protective sleeve 70, and before the detection device works, the claw screw can sequentially penetrate through the avoidance hole in the protective sleeve 70 and the cylinder 11 until the claw screw is firmly fixed on the pulser control valve, so that the fixed connection between the detection device and the pulser control valve is realized.
When the detection device is required to detect whether the pulser control valve can normally work under a given load, a proper pressure spring is selected, the pressure spring is in a pre-compression stress state, the pressure spring drives the indicating sheet and the force measuring rod to simultaneously move along the direction of the guide piece 12 towards the pulser control valve through the sliding piece 50, and therefore the pressure spring is enabled to give an approximately constant force to the pulser control valve 100 along the preset direction, the force range is 26N-31N, and the force is used for simulating the force of an external load. At this time, the internal components of the pulser-controlled valve 100 are controlled by the electric signal, so that the tip of the pulser-controlled valve generates a position change moving back and forth. The indicating sheet and the force measuring rod are both arranged between the elastic force application part 20 and the pulser control valve 100, and the movement of the pulser control valve 100 can drive the indicating sheet, the force measuring rod and the sliding part 50 to move along the guide part 12 in the opposite direction. In the process, the indicating sheet detects the position of the pulser control valve, and the detecting device can lead the position change of the sharp head of the pulser control valve to the indicating sheet through the force measuring rod. When the indicating sheet detects that the moving distance of the pulser control valve is about 4mm, the pulser control valve can work normally.
Features that are described and/or illustrated above with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
The many features and advantages of these embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of these embodiments which fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the embodiments of the invention to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.
The invention has not been described in detail and is in part known to those of skill in the art.
Claims (8)
1. A sensing device for a pulser-controlled valve, comprising:
a base (10) having an accommodating portion (10 a);
an elastic force application part (20) arranged in the accommodating part (10a), wherein the elastic force application part (20) is used for applying preset pressure to the pulser control valve (100);
a position detection unit (30) provided between the elastic biasing unit (20) and the pulser control valve (100), the position detection unit (30) detecting the position of the pulser control valve (100);
a pressure detection unit (40) connected to the position detection unit (30), the pressure detection unit (40) being provided between the elastic biasing unit (20) and the pulser control valve (100), the pressure detection unit (40) being configured to detect a thrust of the pulser control valve (100);
the position detection part (30) comprises an indication sheet which is connected with the pressure detection part (40);
the accommodating part (10a) comprises a first accommodating hole (101a) and a second accommodating hole (102a), the first accommodating hole (101a) and the second accommodating hole (102a) are arranged at an included angle, the elastic force application part (20) is arranged in the first accommodating hole (101a), and the indicating sheet is movably arranged in the first accommodating hole (101a) and the second accommodating hole (102 a).
2. The detection device according to claim 1, characterized in that said base (10) comprises:
a cylinder (11);
the guide piece (12) is connected with the cylinder (11), the accommodating part (10a) is formed between the cylinder (11) and the guide piece (12), and the elastic force application part (20) is sleeved on the guide piece (12).
3. The detection device according to claim 2, further comprising:
the sliding piece (50) is sleeved on the guide piece (12), one end of the sliding piece (50) is abutted to the elastic force application part (20), the other end of the sliding piece (50) is connected with the position detection part (30), and the sliding piece (50), the position detection part (30) and the pressure detection part (40) can move along the guide piece (12).
4. The detecting device according to claim 1, characterized in that it further comprises an indicating line provided at a position of the base (10) near the second receiving hole (102a), the indicating line corresponding to a moving position of the indicating piece.
5. The detection device according to any one of claims 1 to 3, wherein the pressure detection portion (40) includes a force measuring rod disposed between the position detection portion (30) and a pulser control valve (100).
6. The detection device according to any one of claims 1 to 3, further comprising a fixing portion (60), the fixing portion (60) being connected with the base (10), the fixing portion (60) being used for fixing a pulser control valve (100).
7. The detection device according to claim 6, wherein the fixing portion (60) comprises at least one screw (61), at least one screw (61) passing through the base (10) to fix the pulser-controlled valve (100).
8. The detection device according to any one of claims 1 to 3, further comprising a protective sheath (70), the protective sheath (70) being connected to the base (10), the pressure detection portion (40) being located within the protective sheath (70).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710858410.3A CN109540361B (en) | 2017-09-21 | 2017-09-21 | Detection device for pulser control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710858410.3A CN109540361B (en) | 2017-09-21 | 2017-09-21 | Detection device for pulser control valve |
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| Publication Number | Publication Date |
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| CN109540361A CN109540361A (en) | 2019-03-29 |
| CN109540361B true CN109540361B (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710858410.3A Active CN109540361B (en) | 2017-09-21 | 2017-09-21 | Detection device for pulser control valve |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876594A (en) * | 2009-04-28 | 2010-11-03 | 上海袋式除尘配件有限公司 | Method for detecting performance of pulse valve |
| CN102507048A (en) * | 2011-11-23 | 2012-06-20 | 上海神开石油化工装备股份有限公司 | Excitation tension testing device of leaf-spring-type pulse generator |
| CN104330201A (en) * | 2014-12-02 | 2015-02-04 | 上海神开石油设备有限公司 | Detection device for detecting thrust and stroke of pulser |
| CN205384135U (en) * | 2015-12-29 | 2016-07-13 | 北京市普利门机电高技术公司 | Pulser stroke detection device |
-
2017
- 2017-09-21 CN CN201710858410.3A patent/CN109540361B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876594A (en) * | 2009-04-28 | 2010-11-03 | 上海袋式除尘配件有限公司 | Method for detecting performance of pulse valve |
| CN102507048A (en) * | 2011-11-23 | 2012-06-20 | 上海神开石油化工装备股份有限公司 | Excitation tension testing device of leaf-spring-type pulse generator |
| CN104330201A (en) * | 2014-12-02 | 2015-02-04 | 上海神开石油设备有限公司 | Detection device for detecting thrust and stroke of pulser |
| CN205384135U (en) * | 2015-12-29 | 2016-07-13 | 北京市普利门机电高技术公司 | Pulser stroke detection device |
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| CN109540361A (en) | 2019-03-29 |
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